<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <script>
        // 需求：在控制台输出数字8，变量i=0;  结束  i = 20;
        console.log(8);
        
    </script>
</body>
</html>